Hot-blast valve.



PATENTED MAY 24, 1904.

No. 760,873. I

- J. KENNEDY.

HOT BLAST VALVE. APPLICATION FILED FEB. 12, 1904.

NO MODEL.

8 h j r [1 ill mvzinon WITNISSIS nzzmmzms Farms 00, "HOTO-LXTHQ.wasnmumu, n c.

Patented May 24, 1904.

PATENT I OFFICE.

JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

HOT-BLAST VALVE.

SPECIFICATION forming part of Letters Patent No; 760,873, dated. May 24,1904.

' Application filed February 12, 1904. Serial No. 193.280. (No model.)

i To all whom it may concern:

Be it knownthat I, JULIAN .KENNEDY, of Pittsburg, Allegheny county,Pennsylvania, have invented a ew and useful Hot-Blast Valve, of whichthe following is a full, clear, and exact description, reference beinghad. to the accompanying drawing, forming part of this specification, inwhich the figure is a side elevation, partly broken away, showing myimproved valve and easing.

My invention relates to theclass of. hot-blast valves wherein thevalve-seat is gripped between sections of the valve-casing, and moreespecially to the means for gripping and releasing the valve seat.Heretofore these Valve-seats have been drawn together to grip the seat,and to release the seats separate jacks have been used to jack up theupperpart of the casing and release the seat, which was then drawn outand a new one inserted My invention is designed to do away with the useof separate jacks or means for forcing the gripping-rin gs apart and toprovide mechanism for drawing the rings together, which may also be usedfor forcing them apart to release the valve-seat and take the weight ofthe I upper part of thecasing. y

In the drawing, 2 represents the upper portion, and 3 the lower portion,of a hot-blastva'lve casing, these sections having their adjacent endsprovided with rings 4 4:, prefer-- pair of stems are engaged by asleeve-nut 12,

having right and left hand threads engaging the stems. The shoulders 11of the clamp abut against the inner shoulders of the grippingrings,while the hooks engage the upper and lower edges of these rings. Byturning the sleeve-nuts in one direction the rings are drawn toward eachother to clamp the seat, while by turning the nuts in the oppositedirections the casing-sections will be forced apart by theclamp-shoulders bearing upon them, thus jacking up the uppercasing-section to release the valve-seat, which may be drawn out andreplaced.

Theiadvantages of my invention result from the use of the surroundingrow of clamps, which are also arranged to force the grippingrings apart,thus doing away with the use of separate jacks or apparatus forseparating the casing-sections.

Variations may be made in the form and arrangement of theclamping-ringsfche clamps,

the valve-seat, &c. without departing from my invention.

' I claim- '1. A hot-blast-valve casing formed in two sections withclamping-rings at their adjacent ends, a valve-seat between the rings,and clamps-arranged to draw the rings together and having thereon meansfor forcing the rings JULIAN KENNEDY.

Witnesses: I w

' JOHN MILLER,

H. M..OoRw1N.

